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Thread: Bottom bracket

  1. #1
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    Bottom bracket

    Curious, When I pedal I feel a hitch on the down stroke. It only happens once a revolution. I checked the crankarms and they appear to be tight. I think it could be the bottom bracket. Any suggestions?

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    Senior Member Sincitycycler's Avatar
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    Check your rear derailleur pulleys to see if they are gunked out. Happend to me!
    "How did all those 'Keep Off the Grass' signs get there?"

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    It could be you BB or your cranks. I had a hitch on my bike trip this fall with a new bike. I was expecting it as part of break-in for the new cranks (old style), but I hadn't been able to get a big crank tool to carry with me, up to that point all my cranks had used a hex bolt, the new ones use an 8mm tool. It was only solved when a pro with BIG wrenches cranked the pedals, the BB, and the cranks. What I usually do at home is pull the cranks, and lube the tapers, and then re-install. That works better than brute force. Not familiar with the new style cranks.

  4. #4
    Senior Member slagjumper's Avatar
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    I've resorted to using an 18" breaker bar with a deep 14 or 15mm socket. Could also use one of those big needle style torque wrench. The new style has a hex. Some are even self-extracting.

  5. #5
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    Quote Originally Posted by slagjumper
    I've resorted to using an 18" breaker bar with a deep 14 or 15mm socket. Could also use one of those big needle style torque wrench. The new style has a hex. Some are even self-extracting.

    Hair Dryer - I recently adjusted by bottom bracket bearings and the lock nut was frozen. (The large crome nut with square notches that needs a special wrench.) After being warmed up by a hair dryer and being banged by a small plastic hammer, the nut freed up.

    I am not sure how this would work with the crank arms. Apparently aluminium expands faster than steel. But if things won't move a little heat my help free them up. They may be freer after they cool down.

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